On Thu, 19 Jul 2001, Jeffrey S. Sharp wrote:
> On Thu, 19 Jul 2001 mjsnodgr_at_rockwellcollins.com wrote:
> >
> > I've had 256k DSL for about 9 months now
>
> Is 256 kbps common for DSL or cable?
>
> A network admin at the local cable company here (who handles my cable
> modem service) told me that their infrastructure can do 10 Mbps to each
> modem, but that the software in the modem was configured to limit that to
> 2 Mbps. I don't know if the software limit story is true, but I can vouch
> for the 2 Mbps effective rate. I've had FTP transfers in excess of 200
> KBps before.
Once you have firgured out your cable modem's IP address from its DHCP
or ARP broadcasts, there is a snmp mib where you can see what you are
limited to. My roadrunner cable modem has 384k upload 2m download
transmission.127.1.1.3.1.3.1 = 384000
transmission.127.1.1.3.1.5.1 = 2000000
Originally the roadrunner folks had their configurations wrong and various
broadcasts were entering the network that weren't supposed to be there
unlike the DHCP or ARP). I was getting broadcasts for Novell get nearest
servers, HP jet direct printservers and other oddities on other people's
networks. For a while I had linux latd misconfigured to be going out my
eth0 by mistake and I am sure that others were getting my LAT service
broadcasts. :-)
>
> > had about 37 minutes of down time.
>
> I've had more than that. Sometimes it happens several times per week, but
> there have also been periods of several months without problems. Only one
> outage has lasted over 30 minutes. It's been good enough for me to run
> this mail server on it.
>
When I first had mine installed the downtime was extensive each week.
More recently availability has been good, but the usenet news server has
sucked. Most recently it has been okay too.
> Speaking of running servers: my cable company supports it. I've never
> came out and asked them directly, but all the evidence is there. There
> are explicit provisions in the service agreement against running servers
> _for_other_parties_, but no other mention. IPs are assigned via DHCP (I
> probably ought to ask if static IPs are available), but you always get the
> same IP until you change NICs. Finally, I've been running a mail server
> over my link for a while, and my logs show that the cable company has
> tested it for open relaying (which I don't do) several times. I have
> never gottan a call from them asking me to not have the server up.
>
I have had similar experiences. I use /etc/hosts.allow /etc/hosts.deny on
my Linux box to limit accessibility for everything but ssh to my work
domain. I see on the local homepage that various folks run servers for
various things from gaming to backyard video cameras.
The local phone company has the DSL infrastructure in place for itself (I
have been in the frame relay switchroom where the DSL stuff hooks to their
FR network and all the parts are there ready to go) but won't deploy it
due to internal political reasons. There are one or more alternate
providers in the area, at least one of which was affected by the large DSL
company which went out of business several months ago.
> --
> Jeffrey S. Sharp
> jss_at_ou.edu
>
--
Received on Thu Jul 19 2001 - 18:28:40 BST